What’s a PI HAT? Glad you asked!
In a nutshell a HAT is a rectangular board (65x56mm) that has four mounting holes in the (nicely rounded) corners that align with the mounting holes on the B+, has a 40W GPIO header and supports the special autoconfiguration system that allows automatic GPIO setup and driver setup. The automatic configuration is achieved using 2 dedicated pins (ID_SD and ID_SC) on the 40W B+ GPIO header that are reserved for an I2C EEPROM. The EEPROM holds the board manufacturer information, GPIO setup and a thing called a ‘device tree‘ fragment – basically a description of the attached hardware that allows Linux to automatically load the required drivers.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Maker Business — Lessons Learned Scaling Airbnb 100X
Wearables — Start with a sketch
Electronics — When do I use X10?
Biohacking — Project Peri – Translates Sound into Light for the Hearing Impaired
No comments yet.
Sorry, the comment form is closed at this time.